Navigation Links
Researchers develop ultra-simple method for creating nanoscale gold coatings
Date:6/16/2010

Troy, N.Y. Researchers at Rensselaer Polytechnic Institute have developed a new, ultra-simple method for making layers of gold that measure only billionths of a meter thick. The process, which requires no sophisticated equipment and works on nearly any surface including silicon wafers, could have important implications for nanoelectronics and semiconductor manufacturing.

Sang-Kee Eah, assistant professor in the Department of Physics, Applied Physics, and Astronomy at Rensselaer, and graduate student Matthew N. Martin infused liquid toluene a common industrial solvent with gold nanoparticles. The nanoparticles form a flat, closely packed layer of gold on the surface of the liquid where it meets air. By putting a droplet of this gold-infused liquid on a surface, and waiting for the toluene to evaporate, the researchers were able to successfully coat many different surfaces including a 3-inch silicon wafer with a monolayer of gold nanoparticles.

"There has been tremendous progress in recent years in the chemical syntheses of colloidal nanoparticles. However, fabricating a monolayer film of nanoparticles that is spatially uniform at all length scales from nanometers to millimeters still proves to be quite a challenge," Eah said. "We hope our new ultra-simple method for creating monolayers will inspire the imagination of other scientists and engineers for ever-widening applications of gold nanoparticles."

Watch a video demonstration of this new fabrication process at: http://www.youtube.com/watch?v=nqkwM9o1s-w

Results of the study, titled "Charged gold nanoparticles in non-polar solvents: 10-min synthesis and 2-D self-assembly," were published recently in the journal Langmuir. Read the journal paper at: http://dx.doi.org/10.1021/la100591h

Whereas other synthesis methods take several hours, this new method chemically synthesizes gold nanoparticles in only 10 minutes without the need for any post-synthesis cleaning, Eah said. In addition, gold nanoparticles created this way have the special property of being charged on non-polar solvents for 2-D self-assembly.

Previously, the 2-D self-assembly of gold nanoparticles in a toluene droplet was reported with excess ligands, which slows down and complicates the self-assembly process. This required the non-volatile excess ligands to be removed in a vacuum. In contrast, Eah's new method ensures that gold nanoparticles float to the surface of the toluene drop in less than one second, without the need for a vacuum. It then takes only a few minutes for the toluene droplet to evaporate and leave behind the gold monoloayer.

"The extension of this droplet 2-D self-assembly method to other kinds of nanoparticles, such as magnetic and semiconducting particles, is challenging but holds much potential," Eah said. "Monolayer films of magnetic nanoparticles, for instance, are important for magnetic data storage applications. Our new method may be able to help inform new and exciting applications."


'/>"/>

Contact: Michael Mullaney
mullam@rpi.edu
518-276-6161
Rensselaer Polytechnic Institute
Source:Eurekalert  

Related biology technology :

1. Texas A&M veterinary researchers achieve cloning first
2. Researchers use X-ray diffraction microscope to reveal 3-D internal structure of whole cell
3. Researchers discover new properties of Worlds thinnest material
4. Sandia researchers Phillips, Moody named MRS Fellows
5. First Self-Replicating, Synthetic Bacterial Cell Constructed by J. Craig Venter Institute Researchers
6. Investigating how spiders spin their silk, researchers unravel a key step
7. UCLA researchers use new microscope to see atoms for first time
8. NIST researchers holding steady in an atomic-scale tug-of-war
9. Researchers use improved nanogenerators to power sensors based on zinc oxide nanowires
10. Researchers identify a gene that may play a key role in atherosclerosis and other diseases
11. Thomson Reuters Names the Worlds Hottest Researchers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers develop ultra-simple method for creating nanoscale gold coatings
(Date:1/19/2017)... ... January 18, 2017 , ... LabRoots , the ... around the world, was today awarded the "Best Science & Technology Social Networking ... merit and decided upon by a dedicated team of researchers and analysts. , ...
(Date:1/19/2017)... , Jan. 18, 2017  Northwest Biotherapeutics, Inc. ... DCVax® personalized immune therapies for operable and inoperable solid ... , Chief Technical Officer of NW Bio, will present ... 19, 2017, at the Hyatt Regency Hotel in ... will chair the session entitled "New Therapeutic Approaches – ...
(Date:1/18/2017)... January 18, 2017 According to a new market research ... Cytology, Infectious Disease), & End User (Molecular Diagnostic Laboratories, Academic and Research Institutions) ... reach USD 739.9 Million by 2021 from USD 557.1 Million in 2016, growing ... ... MarketsandMarkets Logo ...
(Date:1/18/2017)... ... January 18, 2017 , ... Executive ... 2017 in its continued commitment to the advancement of the clinical trials segment. ... issues related to clinical trial planning and management. , As executive talent ...
Breaking Biology Technology:
(Date:1/12/2017)... 12, 2017 A new report by Allied Market Research, titled, ... biometric technology market is expected to generate revenue of $10.72 billion by 2022, with ... Continue Reading ... Allied Market Research Logo ...      (Logo: http://photos.prnewswire.com/prnh/20140911/647229) In the ...
(Date:1/6/2017)... Calif. , Jan. 5, 2017  Delta ID ... its iris scanning technology for automotive at CES® 2017. ... GNTX ) to demonstrate the use of iris ... identify and authenticate the driver in a car, and ... during the driving experience. Delta ID and ...
(Date:12/22/2016)... NEW YORK , December 22, 2016 ... global provider of secure solutions for the e-Government, Public Safety, HealthCare, ... a subsidiary of SuperCom, has been selected to implement and deploy ... county in Northern California , further expanding its ... ...
Breaking Biology News(10 mins):